Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luc hoc nghe snippets" » "luc hoc nghien snippets", "luc khoe nghe snippets", "luc hoc he snippets", "duoc hoc nghe snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("luc hoc nghe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luc hoc nghe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luc hoc nghe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc hoc nghe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.